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Bacterial culture

Jennifer H Wilson-Welder, Jarlath E Nally, David P Alt, Samuel B Humphrey, Steven C Olsen
Digital dermatitis is an infectious disease of cattle and the leading cause of lameness. This disease is complicated by the reoccurrence of the lesions and the observation of lesions on more than one limb at different time points, indicating infection may not result in a protective immune response. The objective of this study was to characterize the peripheral blood cellular response in naturally infected and naïve cattle to bacterial antigens derived from pathogens associated with digital dermatitis lesions...
June 13, 2018: Journal of Dairy Science
Izumi Mashima, Hiroshi Miyakawa, Frank A Scannapieco, Futoshi Nakazawa
Oral biofilm, the cause of dental caries and periodontal diseases, consists of multiple bacterial species. Streptococcus spp. and Veillonella spp. have been reported as to be initial and early colonizers of oral biofilms. Our previous studies showed that Veillonella tobetsuensis may play an important role on the development of S. gordonii biofilms without coaggregation involving extracellular biomolecules. In this study, the effect of a cyclic dipeptide autoinducer from culture supernatants from V. tobetsuensis at late-exponential growth phase on S...
June 13, 2018: Anaerobe
Yash A Choksi, Vishruth K Reddy, Kshipra Singh, Caitlyn W Barrett, Sarah P Short, Bobak Parang, Cody E Keating, Joshua J Thompson, Thomas G Verriere, Rachel E Brown, M Blanca Piazuelo, David M Bader, M Kay Washington, Mukul K Mittal, Thomas Brand, Alain P Gobert, Lori A Coburn, Keith T Wilson, Christopher S Williams
Blood vessel epicardial substance (BVES), or POPDC1, is a tight junction-associated transmembrane protein that modulates epithelial-to-mesenchymal transition (EMT) via junctional signaling pathways. There have been no in vivo studies investigating the role of BVES in colitis. We hypothesized that BVES is critical for maintaining colonic epithelial integrity. At baseline, Bves -/- mouse colons demonstrate increased crypt height, elevated proliferation, decreased apoptosis, altered intestinal lineage allocation, and dysregulation of tight junctions with functional deficits in permeability and altered intestinal immunity...
June 15, 2018: Mucosal Immunology
Suporn Paksanont, Kitisak Sintiprungrat, Thatcha Yimthin, Pornpan Pumirat, Sharon J Peacock, Narisara Chantratita
Burkholderia pseudomallei is a flagellated, gram-negative environmental bacterium that causes melioidosis, a severe infectious disease of humans and animals in tropical areas. We hypothesised that B. pseudomallei may undergo phenotypic adaptation in response to an increase in growth temperature. We analysed the growth curves of B. pseudomallei strain 153 cultured in Luria-Bertani broth at five different temperatures (25 °C-42 °C) and compared the proteomes of bacteria cultured at 37 °C and 42 °C...
June 15, 2018: Scientific Reports
Ghiles Grine, Elodie Terrer, Mahmoud Abdelwadoud Boualam, Gérard Aboudharam, Hervé Chaudet, Raymond Ruimy, Michel Drancourt
The oral fluid microbiome comprises an important bacterial diversity, yet the presence of archaea has not been reported so far. In order to quest for the presence of methanogenic archaea (methanogens) in oral fluid, we used a polyphasic approach including PCR-sequencing detection, microscopic observation by fluorescence in-situ hybridization, isolation and culture, molecular identification and genotyping of methanogens in 200 oral fluid specimens. In the presence of negative controls, 64/200 (32%) prospectively analysed oral fluid specimens were PCR-positive for methanogens, all identified as Methanobrevibacter oralis by sequencing...
June 15, 2018: Scientific Reports
Chia-Yi Lien, Jun-Jun Lee, Chun-Chih Chien, Chi-Ren Huang, Cheng-Hsien Lu, Wen-Neng Chang
Adult bacterial meningitis (ABM) caused by Citrobacter (C.) infection is very uncommon and the clinical characteristics of this specific infectious syndrome have not been analyzed in the literature. The clinical characteristics of six Citrobacter ABM patients collected during a study period of 30 years (1986-2015) were enrolled, and they accounted for 1.1% (6/540) of our ABM patients. In this study, a total of 14 patients with Citrobacter ABM (six collected from our hospital and eight from the literature) were included for analysis...
June 12, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Ankita Singh, Aditya N Sarangi, Amit Goel, Rajni Srivastava, Rajat Bhargava, Priyanka Gaur, Amita Aggarwal, Rakesh Aggarwal
BACKGROUND: Probiotics have been shown to be useful for the treatment of many disease conditions. These beneficial effects are believed to be mediated by change in the composition of gut microbiota and modulation of the host immune responses. However, the available data on the effect of probiotics on these parameters are quite limited. METHODS: We studied the composition of fecal microbiota, using 16S rRNA sequencing, and host immune responses in peripheral blood (plasma cytokine levels, T cell subsets and in vitro cytokine production after stimulation with anti-CD3/CD28 antibody or lipopolysaccharide) in a group of 14 healthy women at three time-points - before and after administration of a probiotic preparation (a capsule of VSL#3, each containing 112...
June 15, 2018: BMC Gastroenterology
Kazuki Nosho, Koji Yasuhara, Yuto Ikehata, Tomohiro Mii, Taichiro Ishige, Shunsuke Yajima, Makoto Hidaka, Tetsuhiro Ogawa, Haruhiko Masaki
Most bacterial cells in nature exhibit extremely low colony-forming activity, despite showing various signs of viability, impeding the isolation and utilization of many bacterial resources. However, the general causes responsible for this state of low colony formation are largely unknown. Because liquid cultivation typically yields more bacterial cell cultures than traditional solid cultivation, we hypothesized that colony formation requires one or more specific gene functions that are dispensable or less important for growth in liquid media...
June 15, 2018: Microbiology
Christin Bruchhagen, Marcel Jarick, Carolin Mewis, Tobias Hertlein, Silke Niemann, Knut Ohlsen, Georg Peters, Oliver Planz, Stephan Ludwig, Christina Ehrhardt
Influenza virus (IV) infections cause severe respiratory illnesses that can be complicated by bacterial super-infections. Previously, we identified the cellular Raf-MEK-ERK cascade as a promising antiviral target. Inhibitors of MEK, such as CI-1040, showed potent antiviral activity. However, it remained unclear if this inhibitor and its active form, ATR-002, might sensitize host cells to either IV or secondary bacterial infections. To address these questions, we studied the anti-pathogen activity of ATR-002 in comparison to CI-1040, particularly, its impact on Staphylococcus aureus (S...
June 14, 2018: Scientific Reports
A Le Bot, P Jégo, E Donal, E Flécher, M Revest, P Tattevin
Non-infective endocarditis, also referred to as non-bacterial thrombotic endocarditis, represent a wide range of rare pathologies, often severe. This review gathered the data available in the literature, to decipher the major information collected on the pathophysiology, the diagnosis and the treatment of these heterogeneous diseases, often misdiagnosed. Characteristics of non-infective endocarditis are similar to infective endocarditis in terms of valvular lesions (mostly left-sided, with regurgitations and vegetations), and their complications (embolism)...
June 11, 2018: La Revue de Médecine Interne
Serap Gedikli, Gökhan Güngör, Yağmur Toptaş, Dilber Ece Sezgin, Murat Demirbilek, Nuray Yazıhan, Pınar Aytar Çelik, Emir Baki Denkbaş, Vural Bütün, Ahmet Çabuk
In the present study, culture conditions of Streptococcus equi was optimized through Box-Behnken experimental design for hyaluronic acid production. About 0.87 gL-1 of hyaluronic acid was produced under the determined conditions and optimal conditions were found as 38.42 °C, 24 hr and 250 rpm. The validity and practicability of this statistical optimization strategy were confirmed relation between predicted and experimental values. The hyaluronic acid obtained under optimal conditions was characterized...
June 14, 2018: Preparative Biochemistry & Biotechnology
Zhe Wu, Jiang Tan, Yujing Chi, Feng Zhang, Jun Xu, Yang Song, Xu Cong, Na Wu, Yulan Liu
Visceral adipose tissue (VAT) is related to non-alcoholic fatty liver disease (NAFLD). However, the role of mesenteric adipose tissue (MAT), part of the VAT, in NAFLD is unclear. In the present study, we monitored the liver and four depots of the VAT in high fat diet (HFD) feeding mice at multiple time points (4, 8, and 12 weeks). The MAT had become inflamed by the 8th week of HFD feeding, earlier than other depots of VAT. Furthermore, MAT removal after 8 weeks of HFD resulted in more severe steatosis and more foci of inflammation infiltration, as well as higher NAFLD activity scores...
June 14, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
Le-Xiang Cui, Li-Na Gu, Yan-Bo Hou, Bei-Lin Zhang, Jing-Yao Liu
RATIONALE: Purulent meningitis refers infection of the subarachnoid space by various purulent bacteria and the corresponding inflammation of the leptomeninges. However, purulent meningitis due to Rhodococcus equi is extremely rare. PATIENT CONCERNS: A 40-year-old man presented with fever and intermittent headache for 6 days. Two hours prior to admission, he developed epileptic seizures. DIAGNOSES: Brain computed tomography and magnetic resonance imaging showed intracerebral malacic lesions...
June 2018: Medicine (Baltimore)
Vladimir Mouraviev, Michael McDonald
INTRODUCTION: The changing face of current infection phenotypes from planktonic to biofilm type has been developed implicating bacterial biofilms in recurrent infection. To date, no specific medical treatment exists to specifically target biofilms in the human host. Similarly, the identification of a biofilm has relied upon the analysis of tissue samples with electron microscopy or DNA identification with polymerase chain reaction (PCR) and sequencing. Standard culture and sensitivity test is not able to detect a presence of biofilms...
June 2018: Canadian Journal of Urology
Kamarul Zaman Zarkasi, Mardani Abdul Halim, Teh Faridah Nazari, Feizal Daud
This article contains data on the bacterial communities and its diversity associated with Anadara granosa . The A. granosa samples were obtained from two major estuaries in Penang, Malaysia using a culture dependent and 16S rRNA Illumina sequencing approaches. A. granosa , a commercial blood cockles and popular seafoods, is fragile to the surrounding environments. Thus, our research focused to better understand the bacterial communities and it diversity in the A. granosa , as well as on the generation of a metagenomic library from A...
August 2018: Data in Brief
Zhe Xun, Qian Zhang, Tao Xu, Ning Chen, Feng Chen
Inflammatory bowel diseases (IBDs) are chronic, idiopathic, relapsing disorders of unclear etiology affecting millions of people worldwide. Aberrant interactions between the human microbiota and immune system in genetically susceptible populations underlie IBD pathogenesis. Despite extensive studies examining the involvement of the gut microbiota in IBD using culture-independent techniques, information is lacking regarding other human microbiome components relevant to IBD. Since accumulated knowledge has underscored the role of the oral microbiota in various systemic diseases, we hypothesized that dissonant oral microbial structure, composition, and function, and different community ecotypes are associated with IBD; and we explored potentially available oral indicators for predicting diseases...
2018: Frontiers in Microbiology
Naser Owji, Alireza Zareifard
PURPOSE: The purpose of this study was to evaluate the changes of conjunctival bacterial flora 1 year after successful dacryocystorhinostomy (DCR). METHODS: Seventy-two consecutive adult patients with successful DCR were enrolled in this study. We obtained conjunctival cultures from the operated eyes, fellow eyes, and nasal mucosa of the operated side 1 year after the operation. After the period of incubation, further evaluation was performed using standard laboratory techniques...
January 2018: Middle East African Journal of Ophthalmology
Fernando Soveral D'aviz, Ana Paula Farina, Matheus Albino Souza, Doglas Cecchin
Aim: The aim of this study was to compare the bacterial reduction achieved with reciprocating instruments such as Reciproc® R25 (VDW GMBH, Munich, Germany) and Reciproc® R25 combined with rotary file Mtwo 40.04 (VDW GMBH) during root canal preparation. Materials and Methods: Fifty mesiobuccal root canals of maxillary molars were contaminated with Enterococcus faecalis broth culture and then an initial bacterial sample was collected from the root canal with paper cones and plated on brain-heart infusion agar...
May 2018: Journal of Conservative Dentistry: JCD
Alexander Crits-Christoph, Spencer Diamond, Cristina N Butterfield, Brian C Thomas, Jillian F Banfield
In soil ecosystems, microorganisms produce diverse secondary metabolites such as antibiotics, antifungals and siderophores that mediate communication, competition and interactions with other organisms and the environment1,2 . Most known antibiotics are derived from a few culturable microbial taxa 3 , and the biosynthetic potential of the vast majority of bacteria in soil has rarely been investigated 4 . Here we reconstruct hundreds of near-complete genomes from grassland soil metagenomes and identify microorganisms from previously understudied phyla that encode diverse polyketide and nonribosomal peptide biosynthetic gene clusters that are divergent from well-studied clusters...
June 13, 2018: Nature
Brigitte Roy, Cécile Philippe, Martin J Loessner, Jacques Goulet, Sylvain Moineau
Applications for bacteriophages as antimicrobial agents are increasing. The industrial use of these bacterial viruses requires the production of large amounts of suitable strictly lytic phages, particularly for food and agricultural applications. This work describes a new approach for phage production. Phages H387 ( Siphoviridae ) and A511 ( Myoviridae ) were propagated separately using Listeria ivanovii host cells immobilised in alginate beads. The same batch of alginate beads could be used for four successive and efficient phage productions...
June 13, 2018: Viruses
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